Look! So many colorful bicycles in two lines over there.—They’re for public. This kind of green smart traffic is ______ in big cities now.

Facing starvation as a result of drought, they had no ________ but to eat the roots of the trees. [ ]

The last time we had a family reunion was ________ my brother’s wedding ceremony four years ago

_____ she had not spelt the word wrong, Cathy would have got a full mark

don’t go there, ______．